Autofocus means the camera decides and does everything for you -you have no control. Manual mode is when you becomes the boss and make all the decision -most of it anyway.

I know this all many years!

It is so hard for some of usto understand the question.

Josbiker

No, it is hard for us to understand you. What do you mean with "Resolution", "Practice" in relation to [Auto]Focus ? Are you maybe using the wrong terms ? like practical instead of practice and sharpness instead of resolution. ?